Provisioned Concurrency also works with AWS Auto Scaling, which allows you to configure scaling actions based on utilization level (think EC2 auto-scaling) or on a schedule (think cron). At the top of the page, click on the Add trigger button. 900 seconds (15 minutes) Function environment The regional concurrency limit starts at 1,000. In AWS Lambda, a concurrency limit determines how many function invocations can run simultaneously in one region. Lambda function throttling can be prevented by a few techniques, it can be done by requesting a higher limit of concurrent executions for your AWS account. If you are bumping Lambda function throttling can be prevented by a few techniques, it can be done by requesting a higher limit of concurrent executions for your AWS account. The unreserved account concurrency is 100. Scale out more function instances in under a second. This is a soft limit that you can increase by submitting a request in the AWS Support Center. When you receive a significant number of requests, Lambda will increase concurrency for your region. Requests limitations by Lambda: Request and response (synchronous calls) body payload size can be up to to 6 MB. The invocation frequency limit is 10x the concurrent execution limit, so for the. Takeaways: - even though Lambda can scale itself up to the account limit of 1000 instances per region, we have possibility to control this with upper limit - it is good to set.

So in the example that we were discussing before, we had three Lambda functions and they were all kind of competing for that 1000 concurrency limit. The number of concurrent function invocations is limited.

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